This is totally a tangent, but after all this time, I'm surprised someone hasn't engineered plumbing systems that don't clog as often. Toilet and sink (esp. in

This is totally a tangent, but after all this time, I'm surprised someone hasn't engineered plumbing systems that don't clog as often. Toilet and sink (esp. in bathrooms, because of hair) clogs are still commonplace. We could use some kind of self-maintaining plumbing systems.